WebGL Three.js宇宙中心模拟动画

Center of the universe，使用6张贴图实现的宇宙三维背景空间。

webgl, space

《three.js使用多个渐变torus模拟光环光晕》申请公开！

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HTML
CSS
JavaScript
Result

编译

JavaScript

var camera, scene, renderer;

var texture_placeholder,
    isUserInteracting = false,
    onMouseDownMouseX = 0,
    onMouseDownMouseY = 0,
    lon = 90,
    onMouseDownLon = 0,
    lat = 0,
    onMouseDownLat = 0,
    phi = 0,
    theta = 0,
    target = new THREE.Vector3();

init();
animate();

function init() {

var container, mesh;

container = document.getElementById('container');

camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 1, 1100);

scene = new THREE.Scene();

texture_placeholder = document.createElement('canvas');
    texture_placeholder.width = 128;
    texture_placeholder.height = 128;

var context = texture_placeholder.getContext('2d');
    context.fillStyle = 'rgb( 200, 200, 200 )';
    context.fillRect(0, 0, texture_placeholder.width, texture_placeholder.height);

var materials = [

loadTexture('/uploads/1707/space4.jpg'), // right
        loadTexture('/uploads/1707/space2.jpg'), // left
        loadTexture('/uploads/1707/space1.jpg'), // top
        loadTexture('/uploads/1707/space6.jpg'), // bottom
        loadTexture('/uploads/1707/space3.jpg'), // back
        loadTexture('/uploads/1707/space5.jpg') // front

];

mesh = new THREE.Mesh(new THREE.BoxGeometry(300, 300, 300, 7, 7, 7), new THREE.MultiMaterial(materials));
    mesh.scale.x = -1;
    scene.add(mesh);

for (var i = 0, l = mesh.geometry.vertices.length; i < l; i++) {

var vertex = mesh.geometry.vertices[i];

vertex.normalize();
        vertex.multiplyScalar(550);

}

renderer = new THREE.CanvasRenderer();
    renderer.setPixelRatio(window.devicePixelRatio);
    renderer.setSize(window.innerWidth, window.innerHeight);
    container.appendChild(renderer.domElement);

document.addEventListener('mousedown', onDocumentMouseDown, false);
    document.addEventListener('mousemove', onDocumentMouseMove, false);
    document.addEventListener('mouseup', onDocumentMouseUp, false);
    //document.addEventListener( 'wheel', onDocumentMouseWheel, false );

document.addEventListener('touchstart', onDocumentTouchStart, false);
    document.addEventListener('touchmove', onDocumentTouchMove, false);

window.addEventListener('resize', onWindowResize, false);

}

function onWindowResize() {

camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();

renderer.setSize(window.innerWidth, window.innerHeight);

}

function loadTexture(path) {

var texture = new THREE.Texture(texture_placeholder);
    var material = new THREE.MeshBasicMaterial({
        map: texture,
        overdraw: 0.5
    });

var image = new Image();
    image.onload = function() {

texture.image = this;
        texture.needsUpdate = true;

};
    image.src = path;

return material;

}

function onDocumentMouseDown(event) {

event.preventDefault();

isUserInteracting = true;

onPointerDownPointerX = event.clientX;
    onPointerDownPointerY = event.clientY;

onPointerDownLon = lon;
    onPointerDownLat = lat;

}

function onDocumentMouseMove(event) {

if (isUserInteracting === true) {

lon = (onPointerDownPointerX - event.clientX) * 0.1 + onPointerDownLon;
        lat = (event.clientY - onPointerDownPointerY) * 0.1 + onPointerDownLat;

}
}

function onDocumentMouseUp(event) {

isUserInteracting = false;

}

//	function onDocumentMouseWheel( event ) {

//	camera.fov += event.deltaY * 0.05;
//	camera.updateProjectionMatrix();

//	}

function onDocumentTouchStart(event) {

if (event.touches.length == 1) {

event.preventDefault();

onPointerDownPointerX = event.touches[0].pageX;
        onPointerDownPointerY = event.touches[0].pageY;

onPointerDownLon = lon;
        onPointerDownLat = lat;

}

function onDocumentTouchMove(event) {

if (event.touches.length == 1) {

event.preventDefault();

lon = (onPointerDownPointerX - event.touches[0].pageX) * 0.1 + onPointerDownLon;
        lat = (event.touches[0].pageY - onPointerDownPointerY) * 0.1 + onPointerDownLat;

}

function animate() {

requestAnimationFrame(animate);
    update();

}

function update() {

if (isUserInteracting === false) {

lon += 0.1;

}

lat = Math.max(-85, Math.min(85, lat));
    phi = THREE.Math.degToRad(90 - lat);
    theta = THREE.Math.degToRad(lon);

target.x = 500 * Math.sin(phi) * Math.cos(theta);
    target.y = 500 * Math.cos(phi);
    target.z = 500 * Math.sin(phi) * Math.sin(theta);

camera.position.copy(target).negate();
    camera.lookAt(target);

renderer.render(scene, camera);

}

编译

CSS

HTML

Center of the universe，使用6张贴图实现的宇宙三维背景空间。

webgl, space

编辑器支持Emmet

快捷键

Center of the universe，使用6张贴图实现的宇宙三维背景空间。

webgl, space

WebGL Three.js 龙卷风和风暴闪电冰咆动画模拟

WebGL Three.js三维宇宙空间旋转背景动画

编辑器支持Emmet

快捷键

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